If the curve has equation y^2 +/- f, then the bundle is represented by a vector bundle on PP^1 and a matrix representing the action of y. the only key is yAction
The object VectorBundleOnE is a type, with ancestor classes MutableHashTable < HashTable < Thing.
The source of this document is in /build/reproducible-path/macaulay2-1.25.06+ds/M2/Macaulay2/packages/PencilsOfQuadrics.m2:2649:0.